Regulating means for centrifugal liquid-separators.



J. V. M. RISBERG.

S FOB GENTRIFUGAL LIQUID SEPARATORS. IAPPLIGATION FILED SEPT. 12, 1914.

REGULATING MEAN 1,131,421. Patented 1V1&r.9, 1915.

. 1 Ely-5 W 6 v 1 177/555 AWZ/z/m/Q 40 J0 I I UNITED srn'rns PATENT ensues.

JOHANNES VAIiDEMiAR mAn'rEN RISBERG, or sonna'rnmn, SWEDEN, assrenon TO AKTIEBOLAGET BALTIC, or soDEnrELJE, SWEDEN, A CORPQRATION or SWEDEN.

REGULATING MEANS FOR CENTRIFUGAL LIQlIID-SEPARATORS.

Specification of Letters Patent.

Patented Mar. 9, 11915.

Application filed September 12, 1914. Serial No. 861,457.

T all whom it may concern:

Be it known that I,.J0rIANNEs VALDEMAR Mfm'rnn RIsBERc, a subject. of the King of Sweden, and resident of Badhusgatan 16, Stidertelje, in the Kingdom of Sweden, have invented certain new and useful Improvements in Regulating Means for Centrifugal Liquid-Separators, of which the following is a specification, reference being had therein to the accompanying drawing.

In centrifugal milk separators provided with a top plate means are used for regulating the proportions of the separated liquids, consisting of a regulating screw which is provided with a passage and is located either in the top plate or in the wall of the drum and by means of which the discharg ing openings of the cream and of the skimmed milk respectively are adjusted. Owing to the fact that the top plate is of a comparatively thin material, a regulating.

screw can be provided in the same only when a ring, disk or the like has been soldered'or in any other manner fixedto the plate for reinforcing the same. In the wall of the drum, on the other hand, which is of a thicker material, a regulating screw may be provided without the said wall being reinforced z'. e. the screw may mesh directly with the wall. For that reason the arrangement last mentioned is preferred by the manufacturers but involves the disadvantage of the skimmed milk leaving the drum at a point located at a reater distance from the rotary axis of the rum than really is necessary, which increases the amount of power necessary for the rotating of the drum.

According to this invention the said disadvantage is removed by providing in a part of the wall of the drum, which is located nearer to the rotary axis of the drum, one or more exit openings for the skimmed milk,

which as to their width are so adapted that the greatest part of the skimmed milk, for instance to per cent, passes through the said openings, while the rest passes through the regulating screw.

In the accompanying drawing Figure 1 is a vertical section partially a side view of a centrifugal drum provided with a regulating device according to this invention. Fig. 2 shows in the same manner the top part of a centrifugal drum provided with a-regulat ing screw of a different construction. Figs.

3 and 4 show in a side view and in an end view-respectively the regulating screw illustrated. in Fig. 2. Figs. 5 and 6 show in a longitudinal section and in an end view a further form of the regulating screw.

The invention is shown adapted to a contrifugal apparatus provided with a center tube 1, a nut 2 meshing with the said tube, a top plate 3 and a hood 4.

5, Fig. 1, is a regulating screw of the construction hitherto used, which is located in the wall of the drum, radially or substantially radially to the drum and provided with a longitudinal passage 6. The said screw is 111 engagement with the hood 4.

The cream passes through an opening 7 provided in the top plate 3. According to this invention an opening 8 (or a plurality of openings) is provided in the part of the hood 4, which is located nearest to the axis of the drum, which opening as to its width and position is so adapted, that the main part of the skimmed milk passes through the same.

The regulation of the proportions of skimmed milk and cream is effected by shifting the screw 5. By moving the regulating screw 5 outward a reduced quantity of cream will leave the separator and, vice versa,.a greater quantity of cream is gained by moving the screw inward. By moving the regulating screw to its outmost position the smallest possible quantity of cream will leave the drum, and the apparatus is so constructed that, when the screw is in its innermost position, the greatest quantity of cream is gained, which on the whole is possible.

5 shown in Fig. 2 and in Figs. 3 and 4 is provided with a slot 9 which divides the screw into two parts for the greater part of its length, leaving a bottom 9* undivided. The screw is so mounted in the drum, that the said bottom 9 is turned inward toward the axis of the drum and normally a part of the slot 9 is uncovered inside the wall of the drum, as shown in Fig. 2. The regulation by means of the screw shown in Figs. 2, 3 and at is effected, as understood without any explanations according to rules contrary to? those stated above with relation to Fig. 1, so that the quantity of skimmed milk is increasedflind the quantity of cream decreased, if the screw is moved inward, and vice versa if the screw is moved outward. One of the advantages of the screw shown in Figs. 2, 3 and 4. consists in the same rules for the adjusting of the screw being applicable as for the adjusting of the so called cream screw used of old, which screw is located in the exit opening for the cream and by means of which the quantity of cream is decreased as the screw is moved inward and vice versa, which rule, so to say, has entered into the consciousness of all users of centrifugal apparatus of the old construction.

Fig. 4- shows a further form of the regulating screw to be used in the same manner as the screw shown in Figs. 2 to 4 inclusive. The screw shown in Fig. 4 has a bore 10 from, which a side slot 11 extends. Any number of slots 9 and 11 respectively may evidently be used, and the construction of the regulating screw may be modified in many other respects as easily understood by those skilled in the art. The invention may be applied to other centrifugal liquid separators than milk separators.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. For the regulating of the proportions I,

of the separated liquids in centrifugal liquid separators the combination of a regulating screw located in the wall of the drum and provided with a passage for the skimmed milk and an outlet opening for the greater quantity of the skimmed milk provided in the wall of the drum nearer to the axis of the drum.

2. For the regulating of the proportions of the separated liquids in centrifugal liquid separators the combination of a regulating screw located substantially radially in the wall of the drum and provided with a lateral outlet opening extending to the side of the screw which is located outside the wall of 

